30121319 has 2 divisors, whose sum is σ = 30121320. Its totient is φ = 30121318.

The previous prime is 30121307. The next prime is 30121321. The reversal of 30121319 is 91312103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30121319 - 2⁴ = 30121303 is a prime.

It is a super-2 number, since 2×30121319² = 1814587716599522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 30121321, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30121319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060659 + 15060660.

It is an arithmetic number, because the mean of its divisors is an integer number (15060660).

Almost surely, 2^30121319 is an apocalyptic number.

30121319 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121319 is an equidigital number, since it uses as much as digits as its factorization.

30121319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 30121319 is about 5488.2892598696. The cubic root of 30121319 is about 311.1415387426.

The spelling of 30121319 in words is "thirty million, one hundred twenty-one thousand, three hundred nineteen".